The others who pleaded not guilty were associated with Incremental, Reuters said; Zvi Goffer's brother Emanuel Goffer, Michael Kimelman and David Plate; Arthur Cutillo, who had been a lawyer at Ropes & Gray LLP; and another lawyer, Jason Goldfarb.

The Galleon insider trading case also involves the employees of some of America’s best-known companies, including International Business Machines Corp, McKinsey & Co and Intel Capital, an arm of Intel Corp.

Reuters also reports that a former Wall Street hedge fund manager, David Slaine, pleaded guilty last December to charges of insider trading that reaped profits of $3 million. The plea was unsealed yesterday.